Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6e95635712a3a3…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 15:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6c0288ae2e4f21e02435615283a0488a SHA-1: 2983c99af09dc68de5caa0be9f3c50de0cbc1ae6 SHA-256: eb6e95635712a3a3af61febfece2d3afc840a69a7017bbe357a934e46b1a2941
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm with 30 external links, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of urgency and password-protected archive lures further supports this, indicating the document is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=seagate+goflex+home+forgot+password PDF link annotation
    • http://pokavitapizinuv.iblogger.org/l_p_c_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/iVE2ggx/beatmania_iidx_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/cZjjShg/odd_eyes_rebellion_dragon_price.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/aij5idh/morovutox.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/54452418507.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/7ihajho/neon_yellow_snakeskin_sandals.pdfIn PDF document text
    • http://nepifenimet.iblogger.org/3cx_outbound_caller_id_format.pdfIn PDF document text
    • http://sasawavivar.mygamesonline.org/66063321495.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/lugeHgh/96019844970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc013d8-3697-4317-9aa8-6b4399dd86a9/maporixevalorapabagatobij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f55c6e4-d2b5-400a-bd69-de0b11145304/como_es_la_estructura_del_texto_narrativo.pdfIn PDF document text
    • http://dubuxizomigowab.rf.gd/metode_sanitary_landfill.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_b88788b9346646aaa148a558ec65b286.pdf?index=trueIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/water_by_the_spoonful_full_play.pdfIn PDF document text
    • http://kipamorilezux.epizy.com/69135619582.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_dd74f0757cbc45c48fc46b096b3aa0f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c6c597-8a57-4767-830d-942df44c234c/dunkin_donuts_vanilla_bean_iced_coffee_nutrition.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/kedisemutenidopuvanaka.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_ba154d3322b44069b848b83d2795bf93.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_e18e3cc2be594f97b6ea90e65ed75390.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f2049a-9c52-4666-b956-0503bd31b7a2/northouse_leadership_theory_and_practice_8th_edition_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 5720 bytes
SHA-256: 23223db1e83dd1b0f70f9ac176c47a0c58197338e33d781f23ef88524cdc239f
font_01_sfnt_off00010740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10740 11044 bytes
SHA-256: e8793e550a2b4125d9b7e2c99640f56d8da1b5637e918a468df059e41eea739e